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Merge pull request #69 from SciML/static
Added Static integers.
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@@ -699,6 +699,7 @@ function __init__() | |
| end | ||
| end | ||
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| include("static.jl") | ||
| include("ranges.jl") | ||
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| end | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,90 @@ | ||
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| """ | ||
| A statically sized `Int`. | ||
| Use `Static(N)` instead of `Val(N)` when you want it to behave like a number. | ||
| """ | ||
| struct Static{N} <: Integer | ||
| Static{N}() where {N} = new{N::Int}() | ||
| end | ||
| Base.@pure Static(N::Int) = Static{N}() | ||
| Static(N::Integer) = Static(convert(Int, N)) | ||
| Static(::Static{N}) where {N} = Static{N}() | ||
| Static(::Val{N}) where {N} = Static{N}() | ||
| Base.Val(::Static{N}) where {N} = Val{N}() | ||
| Base.convert(::Type{T}, ::Static{N}) where {T<:Number,N} = convert(T, N) | ||
| Base.convert(::Type{Static{N}}, ::Static{N}) where {N} = Static{N}() | ||
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| Base.promote_rule(::Type{<:Static}, ::Type{T}) where {T <: AbstractIrrational} = promote_rule(Int, T) | ||
| Base.promote_rule(::Type{T}, ::Type{<:Static}) where {T <: AbstractIrrational} = promote_rule(T, Int) | ||
| for (S,T) ∈ [(:Complex,:Real), (:Rational, :Integer), (:(Base.TwicePrecision),:Any)] | ||
| @eval Base.promote_rule(::Type{$S{T}}, ::Type{<:Static}) where {T <: $T} = promote_rule($S{T}, Int) | ||
| end | ||
| Base.promote_rule(::Type{Union{Nothing,Missing}}, ::Type{<:Static}) = Union{Nothing, Missing, Int} | ||
| Base.promote_rule(::Type{T}, ::Type{<:Static}) where {T >: Union{Missing,Nothing}} = promote_rule(T, Int) | ||
| Base.promote_rule(::Type{T}, ::Type{<:Static}) where {T >: Nothing} = promote_rule(T, Int) | ||
| Base.promote_rule(::Type{T}, ::Type{<:Static}) where {T >: Missing} = promote_rule(T, Int) | ||
| for T ∈ [:Bool, :Missing, :BigFloat, :BigInt, :Nothing, :Any] | ||
| # let S = :Any | ||
| @eval begin | ||
| Base.promote_rule(::Type{S}, ::Type{$T}) where {S <: Static} = promote_rule(Int, $T) | ||
| Base.promote_rule(::Type{$T}, ::Type{S}) where {S <: Static} = promote_rule($T, Int) | ||
| end | ||
| end | ||
| Base.promote_rule(::Type{<:Static}, ::Type{<:Static}) = Int | ||
| Base.:(%)(::Static{N}, ::Type{Integer}) where {N} = N | ||
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| Base.iszero(::Static{0}) = true | ||
| Base.iszero(::Static) = false | ||
| Base.isone(::Static{1}) = true | ||
| Base.isone(::Static) = false | ||
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| for T = [:Real, :Rational, :Integer] | ||
| @eval begin | ||
| @inline Base.:(+)(i::$T, ::Static{0}) = i | ||
| @inline Base.:(+)(i::$T, ::Static{M}) where {M} = i + M | ||
| @inline Base.:(+)(::Static{0}, i::$T) = i | ||
| @inline Base.:(+)(::Static{M}, i::$T) where {M} = M + i | ||
| @inline Base.:(-)(i::$T, ::Static{0}) = i | ||
| @inline Base.:(-)(i::$T, ::Static{M}) where {M} = i - M | ||
| @inline Base.:(*)(i::$T, ::Static{0}) = Static{0}() | ||
| @inline Base.:(*)(i::$T, ::Static{1}) = i | ||
| @inline Base.:(*)(i::$T, ::Static{M}) where {M} = i * M | ||
| @inline Base.:(*)(::Static{0}, i::$T) = Static{0}() | ||
| @inline Base.:(*)(::Static{1}, i::$T) = i | ||
| @inline Base.:(*)(::Static{M}, i::$T) where {M} = M * i | ||
| end | ||
| end | ||
| @inline Base.:(+)(::Static{0}, ::Static{0}) = Static{0}() | ||
| @inline Base.:(+)(::Static{0}, ::Static{M}) where {M} = Static{M}() | ||
| @inline Base.:(+)(::Static{M}, ::Static{0}) where {M} = Static{M}() | ||
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| @inline Base.:(-)(::Static{M}, ::Static{0}) where {M} = Static{M}() | ||
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| @inline Base.:(*)(::Static{0}, ::Static{0}) = Static{0}() | ||
| @inline Base.:(*)(::Static{1}, ::Static{0}) = Static{0}() | ||
| @inline Base.:(*)(::Static{0}, ::Static{1}) = Static{0}() | ||
| @inline Base.:(*)(::Static{1}, ::Static{1}) = Static{1}() | ||
| @inline Base.:(*)(::Static{M}, ::Static{0}) where {M} = Static{0}() | ||
| @inline Base.:(*)(::Static{0}, ::Static{M}) where {M} = Static{0}() | ||
| @inline Base.:(*)(::Static{M}, ::Static{1}) where {M} = Static{M}() | ||
| @inline Base.:(*)(::Static{1}, ::Static{M}) where {M} = Static{M}() | ||
| for f ∈ [:(+), :(-), :(*), :(/), :(÷), :(%), :(<<), :(>>), :(>>>), :(&), :(|), :(⊻)] | ||
| @eval @generated Base.$f(::Static{M}, ::Static{N}) where {M,N} = Expr(:call, Expr(:curly, :Static, $f(M, N))) | ||
| end | ||
| for f ∈ [:(==), :(!=), :(<), :(≤), :(>), :(≥)] | ||
| @eval begin | ||
| @inline Base.$f(::Static{M}, ::Static{N}) where {M,N} = $f(M, N) | ||
| @inline Base.$f(::Static{M}, x::Int) where {M} = $f(M, x) | ||
| @inline Base.$f(x::Int, ::Static{M}) where {M} = $f(x, M) | ||
| end | ||
| end | ||
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| @inline function maybe_static(f::F, g::G, x) where {F, G} | ||
| L = f(x) | ||
| isnothing(L) ? g(x) : Static(L) | ||
| end | ||
| @inline static_length(x) = maybe_static(known_length, length, x) | ||
| @inline static_first(x) = maybe_static(known_first, first, x) | ||
| @inline static_last(x) = maybe_static(known_last, last, x) | ||
| @inline static_step(x) = maybe_static(known_step, step, x) | ||
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